TY - JOUR
T1 - Major advance of South Georgia glaciers during the Antarctic Cold Reversal following extensive sub-Antarctic glaciation
AU - Graham, Alastair G. C.
AU - Kuhn, Gerhard
AU - Meisel, Ove
AU - Hillenbrand, Claus-Dieter
AU - Hodgson, Dominic A.
AU - Ehrmann, Werner
AU - Wacker, Lukas
AU - Wintersteller, Paul
AU - dos Santos Ferreira, Christian
AU - Römer, Miriam
AU - White, Duanne
AU - Bohrmann, Gerhard
N1 - Copyright the Author(s) 2017. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.
PY - 2017/3/17
Y1 - 2017/3/17
N2 - The history of glaciations on Southern Hemisphere sub-polar islands is unclear. Debate surrounds the extent and timing of the last glacial advance and termination on sub-Antarctic South Georgia in particular. Here, using sea-floor geophysical data and marine sediment cores, we resolve the record of glaciation offshore of South Georgia through the transition from the Last Glacial Maximum to Holocene. We show a sea-bed landform imprint of a shelf-wide last glacial advance and progressive deglaciation. Renewed glacier resurgence in the fjords between c. 15,170 and 13,340 yr ago coincided with a period of cooler, wetter climate known as the Antarctic Cold Reversal, revealing a cryospheric response to an Antarctic climate pattern extending into the Atlantic sector of the Southern Ocean. We conclude that the last glaciation of South Georgia was extensive, and the sensitivity of its glaciers to climate variability during the last termination more significant than implied by previous studies.
AB - The history of glaciations on Southern Hemisphere sub-polar islands is unclear. Debate surrounds the extent and timing of the last glacial advance and termination on sub-Antarctic South Georgia in particular. Here, using sea-floor geophysical data and marine sediment cores, we resolve the record of glaciation offshore of South Georgia through the transition from the Last Glacial Maximum to Holocene. We show a sea-bed landform imprint of a shelf-wide last glacial advance and progressive deglaciation. Renewed glacier resurgence in the fjords between c. 15,170 and 13,340 yr ago coincided with a period of cooler, wetter climate known as the Antarctic Cold Reversal, revealing a cryospheric response to an Antarctic climate pattern extending into the Atlantic sector of the Southern Ocean. We conclude that the last glaciation of South Georgia was extensive, and the sensitivity of its glaciers to climate variability during the last termination more significant than implied by previous studies.
UR - http://www.scopus.com/inward/record.url?scp=85015666371&partnerID=8YFLogxK
U2 - 10.1038/ncomms14798
DO - 10.1038/ncomms14798
M3 - Article
C2 - 28303885
AN - SCOPUS:85015666371
SN - 2041-1723
VL - 8
JO - Nature Communications
JF - Nature Communications
M1 - 14798
ER -